Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4989350430f705b…

MALICIOUS

PDF

61.5 KB Created: 2020-11-22 16:42:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5089584e3944183068a8234c51ff5076 SHA-1: de556037edaae58f72f9cf9a29d57feed39fbf79 SHA-256: c4989350430f705b69f035116fd80562e80620cb61dc0175f26adece70cef410
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffine.ru/123?utm_term=flysky+gt3c+manual PDF link annotation
    • https://zazetafulunemu.weebly.com/uploads/1/3/4/5/134599809/kivexanonazedubulu.pdfIn PDF document text
    • https://sibitolifi.weebly.com/uploads/1/3/4/7/134732274/3429796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419194/normal_5f99cf374f8de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f908e69a4b17.pdfIn PDF document text
    • https://fulafokowezoje.weebly.com/uploads/1/3/4/3/134384829/fuwisudulet_jotejona.pdfIn PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/3803396.pdfIn PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/tusulemogisizi.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/efb45fb9b.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/faf657a0e.pdfIn PDF document text
    • https://zukusabaxiwig.weebly.com/uploads/1/3/4/0/134000387/xixewebo.pdfIn PDF document text
    • https://gotowixupin.weebly.com/uploads/1/3/4/3/134393593/223779.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mejawiwomak/javiwevoroke.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/37961715013.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/naxizolokolixakeme.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/russian_formalist_criticism_four_essays.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/xisomasudunu.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/lokeni.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAC5 4912 bytes
SHA-256: f47988bbe09b9cee9fefa19809b417e7c7c7aaa8d55aa2118389fea36489df2f
font_01_sfnt_off0000bb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB6C 9384 bytes
SHA-256: f55e42019db77897f1dae6a02542be913a3192faaee1a4b51fd21b5d7fd166e1
font_02_sfnt_off0000db63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB63 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.